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Finding the Fourth Proportional to 608,056.72, 838,913.70 and 393,468.28

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Solution

The fourth proportional to 608,056.72, 838,913.70 and 393,468.28 is: 542,853.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,056.72 : 838,913.70 = 393,468.28 : x
  2. Step 2: Convert to fraction form
    608,056.72/838,913.70 = 393,468.28/x
  3. Step 3: Cross multiply
    608,056.72x = 838,913.70 × 393,468.28
  4. Step 4: Simplify right side
    608,056.72x = 330,085,930,607.44
  5. Step 5: Solve for x
    x = 330,085,930,607.44/608,056.72
  6. Step 6: Final answer
    x = 542,853.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.